"Created vs Resolved Chart" gadget in a remote mode renders graphs incorrectly for "Cumulative" option enabled

Short overview
 
For a setup with two connected JIRA instances, linked each other, the "Created vs Resolved Chart" gadget in a remote mode (external) renders graphs incorrectly with "Cumulative" option enabled. Displayed graph based on gathered data from a remote instance is not aligned with a related graph on a remote instance in a local mode.

Expected results

Based on exactly the same data both graphs should render identically.

Actual Results

The graph in a local mode displays data correctly, the gadget in a remote mode (external) is broken - the rendered graph is not aligned with the local one on a second JIRA node. See final_result.png

Steps to reproduce

1. Setup two JIRA nodes
   1. jira1 and jira2 with default sample setup.
   2. connect two nodes with each other by creating an application link:
      1. on jira1: Jira Administration -> Applications -> Application links, Configure Application Links: http://jira2:8080
      2. on jira2: Jira Administration -> Applications -> Application links, Configure Application Links: http://jira1:8080
2. Create the Dashboard:
   1. Dashboards -> Manage Dashboards -> Create New Dashboard
3. Create the gadget subscription:
   1. jira1: Add Gadget -> Manage Gadgets -> Subscription, Add a subscription: http://jira2:8080
   2. jira2: Add Gadget -> Manage Gadgets -> Subscription, Add a subscription: http://jira1:8080
4. Add the local gadget to the Dashboard:
   1. jira1: Dashboards -> Your dashboard name -> Add gadget -> Charts -> Created vs Resolved Chart (By Atlassian * Local)
   2. jira1: Edit gadget -> Collection Operation, set Cumulative
5. Add the external gadget to the Dashboard
   1. jira2: Dashboards -> Your dashboard name -> Add gadget -> Load all gadgets -> Charts -> Created vs Resolved Chart (By Atlassian * Local)
   2. jira2: Edit gadget -> Collection Operation, set Cumulative Totals: Yes
6. Load or create some random data (create a few issues with different states: open, in progress, done etc)

Workaround
No workaround found.